<template>
	<div class="login">
		<el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
			<h3 class="title">若依后台管理系统</h3>
			<el-form-item prop="username">
				<el-input
					v-model="loginForm.username"
					type="text"
					size="large"
					auto-complete="off"
					placeholder="账号"
				>
					<template #prefix
						><svg-icon icon-class="user" class="el-input__icon input-icon"
					/></template>
				</el-input>
			</el-form-item>
			<el-form-item prop="password">
				<el-input
					v-model="loginForm.password"
					type="password"
					size="large"
					auto-complete="off"
					placeholder="密码"
					@keyup.enter="handleLogin"
				>
					<template #prefix
						><svg-icon icon-class="password" class="el-input__icon input-icon"
					/></template>
				</el-input>
			</el-form-item>
			<el-form-item prop="code" v-if="captchaEnabled">
				<el-input
					v-model="loginForm.code"
					size="large"
					auto-complete="off"
					placeholder="验证码"
					style="width: 63%"
					@keyup.enter="handleLogin"
				>
					<template #prefix
						><svg-icon icon-class="validCode" class="el-input__icon input-icon"
					/></template>
				</el-input>
				<div class="login-code">
					<img :src="codeUrl" @click="getCode" class="login-code-img" />
				</div>
			</el-form-item>
			<el-checkbox v-model="loginForm.rememberMe" style="margin: 0px 0px 25px 0px"
				>记住密码</el-checkbox
			>
			<el-form-item style="width: 100%">
				<el-button
					:loading="loading"
					size="large"
					type="primary"
					style="width: 100%"
					@click.prevent="handleLogin"
				>
					<span v-if="!loading">登 录</span>
					<span v-else>登 录 中...</span>
				</el-button>
				<div style="float: right" v-if="register">
					<router-link class="link-type" :to="'/register'">立即注册</router-link>
				</div>
			</el-form-item>
		</el-form>
		<!--  底部  -->
		<div class="el-login-footer">
			<span>Copyright © 2018-2023 ruoyi.vip All Rights Reserved.</span>
		</div>
	</div>
</template>

<script setup lang="ts">
import { getCodeImg } from '@/api/login'
import Cookies from 'js-cookie'
import { sm4Encrypt, sm4Decrypt } from '@/utils/sm4'
import useUserStore from '@/store/modules/user'
import { useRouter } from 'vue-router'
import { FormInstance } from 'element-plus'
import { ref } from 'vue'

const userStore = useUserStore()
const router = useRouter()
const loginForm = ref<any>({
	username: 'admin',
	password: 'admin123',
	rememberMe: false,
	code: '',
	uuid: ''
})

const loginRules = {
	username: [{ required: true, trigger: 'blur', message: '请输入您的账号' }],
	password: [{ required: true, trigger: 'blur', message: '请输入您的密码' }],
	code: [{ required: true, trigger: 'change', message: '请输入验证码' }]
}

const codeUrl = ref('')
const loading = ref(false)
// 验证码开关
const captchaEnabled = ref(true)
// 注册开关
const register = ref(false)
const redirect = ref(undefined)
const loginRef = ref<FormInstance>()

function handleLogin() {
	loginRef.value?.validate((valid) => {
		if (valid) {
			loading.value = true
			// 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
			if (loginForm.value.rememberMe) {
				Cookies.set('username', loginForm.value.username, { expires: 30 })
				const enPwd = sm4Encrypt(loginForm.value.password)
				if (enPwd) {
					Cookies.set('password', enPwd, { expires: 30 })
				}
				if (loginForm.value.rememberMe) {
					Cookies.set('rememberMe', String(loginForm.value.rememberMe), { expires: 30 })
				}
			} else {
				// 否则移除
				Cookies.remove('username')
				Cookies.remove('password')
				Cookies.remove('rememberMe')
			}
			// 调用action的登录方法
			userStore
				.login(loginForm.value)
				.then(() => {
					router.push({ path: redirect.value || '/' })
				})
				.catch(() => {
					loading.value = false
					// 重新获取验证码
					if (captchaEnabled.value) {
						getCode()
					}
				})
		}
	})
}

function getCode() {
	getCodeImg().then((res: any) => {
		captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled
		if (captchaEnabled.value) {
			codeUrl.value = 'data:image/gif;base64,' + res.img
			loginForm.value.uuid = res.uuid
		}
	})
}

function getCookie() {
	const username = Cookies.get('username')
	const password = Cookies.get('password')
	const rememberMe = Cookies.get('rememberMe')
	loginForm.value = {
		username: username === undefined ? loginForm.value.username : username,
		password: password === undefined ? loginForm.value.password : sm4Decrypt(password) || '',
		rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
	}
}

getCode()
getCookie()
</script>

<style lang="scss" scoped>
.login {
	display: flex;
	justify-content: center;
	align-items: center;
	height: 100%;
	background-image: url('../assets/images/login-background.jpg');
	background-size: cover;
}
.title {
	margin: 0px auto 30px auto;
	text-align: center;
	color: #707070;
}

.login-form {
	border-radius: 6px;
	background: #ffffff;
	width: 400px;
	padding: 25px 25px 5px 25px;
	.el-input {
		height: 40px;
		input {
			height: 40px;
		}
	}
	.input-icon {
		height: 39px;
		width: 14px;
		margin-left: 0px;
	}
}
.login-tip {
	font-size: 13px;
	text-align: center;
	color: #bfbfbf;
}
.login-code {
	width: 33%;
	height: 40px;
	float: right;
	img {
		cursor: pointer;
		vertical-align: middle;
	}
}
.el-login-footer {
	height: 40px;
	line-height: 40px;
	position: fixed;
	bottom: 0;
	width: 100%;
	text-align: center;
	color: #fff;
	font-family: Arial;
	font-size: 12px;
	letter-spacing: 1px;
}
.login-code-img {
	height: 40px;
	padding-left: 12px;
}
</style>
